Dentistry – Apparatus – Having means to record or indicate jaw movement or position...
Patent
1986-01-02
1987-06-16
Wilson, John J.
Dentistry
Apparatus
Having means to record or indicate jaw movement or position...
433 73, 128777, A61C 1904
Patent
active
046733523
ABSTRACT:
The apparatus comprises a first holder (10) fixed stationarily relative to the upper jaw to the patient's head, and a second holder (16) which is secured to the lower jaw. The second holder contains a number of distributed transmitters (S1, S2, S3) which successively supply stepwise ultrasonic pulses. A supplied ultrasonic pulse is successively received by all of the receivers (E1, E2, E3) of the other holder (10). By the transit times, the distances between the receivers and the activated transmitter may be noted. Changes of the sound velocity are detected by a reference path (S4R, E3; S3, E4R) and used for the correction of the transit time signals. By means of an additional, freely movable holder which also carries a number of transmitters and which contains a scanning tip, the position, data of individual teeth or of other points of the mouth may be imputted into the computer.
REFERENCES:
patent: 4182312 (1980-01-01), Mushabac
patent: 4303077 (1981-12-01), Lewin et al.
patent: 4303919 (1981-12-01), Dimeff
patent: 4330276 (1982-05-01), Becker et al.
patent: 4354836 (1982-10-01), Santoni
patent: 4447207 (1984-05-01), Kataoka et al.
Lepiane Adriene J.
Wilson John J.
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